An electric fan spinning with angular speed of 12rad/s has a kinetic energy of 4.1 Joules what is the moment of inertia of the fan?
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- A solid cylinder with a radius of 4.0 cm has the same mass as a solid sphere of radius R. If the cylinder and sphere have the same moment of inertia about their centers, what is the sphere’s radius?A 200kg disk with a radius of 4.0m is rotating clockwise about the +y axis. A 50kg person is sitting 2.5m from the rotational axis. a) What is the total moment of inertia of the disk and person together? b) What is the initial angular momentum Li of the system? c) A constant 30.0N force is applied to the edge of the disk with an angle of 60° with respect to the moment arm. (+y out of page in top down view) What is the torque on the system? d) What is the final angular momentum if the torque is applied for 2s?Question 5 only.......
- i want solutionsA volley ball players 4.4 kg arm moves at an average angular velocity of 16 rad/s during the execution of a spike. if the average moment of inertia of the extending arm is 0.39 kg*m^2. what is the average radius of rotation for the arm during the spike?Suppose a 0.230 kg ball is thrown at 18.0 m/s to a motionless person standing on ice who catches it with an outstretched arm as shown in the figure below. V (a) Calculate the final linear velocity (in m/s) of the person, given his mass is 92.0 kg. m/s (b) What is his angular velocity (in rad/s) if each arm is 8.00 kg? You may treat the ball as a point mass and treat the person's arms as uniform rods (each has a length of 0.810 m) and the rest of his body as a uniform cylinder of radius 0.170 m. Neglect the effect of the ball on his center of mass so that his center of mass remains in his geometrical center. rad/s (c) Compare the initial and final total kinetic energies. O Initial kinetic energy is the same as final kinetic energy. O Initial kinetic energy is less than final kinetic energy. O Initial kinetic energy is greater than final kinetic energy.
- A compact disk (CD) in the computer rotates with a speed of 750 revolutions per minute A-express the angular speed of the CD IN THE unit of radian/ sec B- how long it takes for the CD to complete 7 revolutionsAn electric fan with angular velocity of 40 rad/s is operating in your room. Upon leaving the roomyou turn off the fan and after 32 revolutions it comes to rest. a) What is angular acceleration of eachblade? b) If the fan had angular velocity 80 rad/s and upon turning off, after 16 revolutions the fancome to rest. What is the angular acceleration of each blade?